Polarization of Λ and Λ[over ¯] Hyperons along the Beam Direction in Pb-Pb Collisions at sqrt[s]_{NN}=5.02 TeV
Affiliations
- 1 Variable Energy Cyclotron Centre, Homi Bhabha National Institute, Kolkata, India.
- 2 Nuclear Physics Institute of the Czech Academy of Sciences, Řež u Prahy, Czech Republic.
- 3 Johann-Wolfgang-Goethe Universität Frankfurt Institut für Informatik, Fachbereich Informatik und Mathematik, Frankfurt, Germany.
- 4 European Organization for Nuclear Research (CERN), Geneva, Switzerland.
- 5 Dipartimento DISAT del Politecnico and Sezione INFN, Turin, Italy.
- 6 INFN, Sezione di Bologna, Bologna, Italy.
- 7 Department of Physics, Aligarh Muslim University, Aligarh, India.
- 8 Korea Institute of Science and Technology Information, Daejeon, Republic of Korea.
- 9 Faculty of Science, P.J. Šafárik University, Košice, Slovakia.
- 10 Indonesian Institute of Sciences, Jakarta, Indonesia.
- 11 NRC «Kurchatov» Institute - ITEP, Moscow, Russia.
- 12 Research Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.
- 13 Fudan University, China.
- 14 National Research Centre Kurchatov Institute, Moscow, Russia.
- 15 INFN, Sezione di Torino, Turin, Italy.
- 16 Central China Normal University, Wuhan, China.
- 17 Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico.
- 18 COMSATS University Islamabad, Islamabad, Pakistan.
- 19 Dipartimento di Fisica e Astronomia dell'Università, Bologna, Italy.
- 20 Sezione INFN, Bologna, Italy.
- 21 University of Houston, Houston, Texas, USA.
- 22 Department of Physics and Technology, University of Bergen, Bergen, Norway.
- 23 Institut für Kernphysik, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, Germany.
- 24 St. Petersburg State University, St. Petersburg, Russia.
- 25 Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania.
- 26 Nikhef, National institute for subatomic physics, Amsterdam, Netherlands.
- 27 Westfälische Wilhelms-Universität Münster, Institut für Kernphysik, Münster, Germany.
- 28 Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.
- 29 INFN, Sezione di Padova, Padova, Italy.
- 30 Lawrence Berkeley National Laboratory, Berkeley, California, USA.
- 31 SUBATECH, IMT Atlantique, Université de Nantes, CNRS-IN2P3, Nantes, France.
- 32 Department of Physics, University of Oslo, Oslo, Norway.
- 33 Yale University, New Haven, Connecticut, USA.
- 34 Laboratoire de Physique des 2 Infinis, Irène Joliot-Curie, Orsay, France.
- 35 INFN, Sezione di Catania, Catania, Italy.
- 36 Gangneung-Wonju National University, Gangneung, Republic of Korea.
- 37 University of Science and Technology of China, Hefei, China.
- 38 Indian Institute of Technology Indore, Indore, India.
- 39 Physics Department, University of Jammu, Jammu, India.
- 40 Université Paris-Saclay Centre d'Etudes de Saclay (CEA), IRFU, Départment de Physique Nucléaire (DPhN), Saclay, France.
- 41 AGH University of Science and Technology, Cracow, Poland.
- 42 Helmholtz-Institut für Strahlen- und Kernphysik, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany.
- 43 Bose Institute, Department of Physics, Kolkata, India.
- 44 Centre for Astroparticle Physics and Space Science (CAPSS), Kolkata, India.
- 45 Dipartimento di Fisica e Astronomia dell'Università, Catania, Italy.
- 46 Sezione INFN, Catania, Italy.
- 47 Physik Department, Technische Universität München, Munich, Germany.
- 48 National and Kapodistrian University of Athens, School of Science, Department of Physics, Athens, Greece.
- 49 Wigner Research Centre for Physics, Budapest, Hungary.
- 50 Nuclear Physics Group, STFC Daresbury Laboratory, Daresbury, United Kingdom.
- 51 Université Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, France.
- 52 University of Liverpool, Liverpool, United Kingdom.
- 53 Dipartimento di Fisica e Astronomia dell'Università, Padova, Italy.
- 54 Sezione INFN, Padova, Italy.
- 55 Lund University Department of Physics, Division of Particle Physics, Division of Particle Physics, Lund, Sweden.
- 56 Joint Institute for Nuclear Research (JINR), Dubna, Russia.
- 57 Indian Institute of Technology Bombay (IIT), Mumbai, India.
- 58 Sección Física, Departamento de Ciencias, Pontificia Universidad Católica del Perú, Lima, Peru.
- 59 Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark.
- 60 Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France, Strasbourg, France.
- 61 NRNU Moscow Engineering Physics Institute, Moscow, Russia.
- 62 Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Mexico City, Mexico.
- 63 Dipartimento di Fisica dell'Università, Turin, Italy.
- 64 Sezione INFN, Turin, Italy.
- 65 Petersburg Nuclear Physics Institute, Gatchina, Russia.
- 66 Institute of Space Science (ISS), Bucharest, Romania.
- 67 Gauhati University, Department of Physics, Guwahati, India.
- 68 Dipartimento di Fisica dell'Università, Cagliari, Italy.
- 69 Sezione INFN, Cagliari, Italy.
- 70 INFN, Laboratori Nazionali di Frascati, Frascati, Italy.
- 71 Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czech Republic.
- 72 The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland.
- 73 The University of Texas at Austin, Austin, Texas, USA.
- 74 Moscow Institute for Physics and Technology, Moscow, Russia.
- 75 Dipartimento di Fisica e Nucleare e Teorica, Università di Pavia, Pavia, Italy.
- 76 INFN, Sezione di Pavia, Pavia, Italy.
- 77 Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA.
- 78 Inha University, Incheon, Republic of Korea.
- 79 Università di Brescia, Brescia, Italy.
- 80 Universidade de São Paulo (USP), São Paulo, Brazil.
- 81 Dipartimento Interateneo di Fisica "M. Merlin", Bari, Italy.
- 82 Sezione INFN, Bari, Italy.
- 83 Politecnico di Bariand Sezione INFN, Bari, Italy.
- 84 Russian Federal Nuclear Center (VNIIEF), Sarov, Russia.
- 85 Stefan Meyer Institut für Subatomare Physik (SMI), Vienna, Austria.
- 86 iThemba LABS, National Research Foundation, Somerset West, South Africa.
- 87 University of the Witwatersrand, Johannesburg, South Africa.
- 88 Universidad Autónoma de Sinaloa, Culiacán, Mexico.
- 89 High Energy Physics Group, Universidad Autónoma de Puebla, Puebla, Mexico.
- 90 Dipartimento di Fisica dell'Università, Trieste, Italy.
- 91 Sezione INFN, Trieste, Italy.
- 92 Saha Institute of Nuclear Physics, Homi Bhabha National Institute, Kolkata, India.
- 93 Université de Lyon, CNRS/IN2P3, Institut de Physique des 2 Infinis de Lyon, Lyon, France.
- 94 Universidade Estadual de Campinas (UNICAMP), Campinas, Brazil.
- 95 University of Tsukuba, Tsukuba, Japan.
- 96 INFN, Sezione di Cagliari, Cagliari, Italy.
- 97 University of Cape Town, Cape Town, South Africa.
- 98 INFN, Sezione di Bari, Bari, Italy.
- 99 School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom.
- 100 Laboratoire de Physique Subatomique et de Cosmologie, Université Grenoble-Alpes, CNRS-IN2P3, Grenoble, France.
- 101 Dipartimento di Scienze e Innovazione Tecnologica dell'Università del Piemonte Orientale and INFN Sezione di Torino, Alessandria, Italy.
- 102 Universidade Federal do ABC, Santo Andre, Brazil.
- 103 National Institute of Science Education and Research, Homi Bhabha National Institute, Jatni, India.
- 104 Dipartimento di Fisica "E.R. Caianiello" dell'Università, Salerno, Italy.
- 105 Gruppo Collegato INFN, Salerno, Italy.
- 106 Frankfurt Institute for Advanced Studies, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, Germany.
- 107 Warsaw University of Technology, Warsaw, Poland.
- 108 Department of Physics, University of California, Berkeley, California, USA.
- 109 Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Havana, Cuba.
- 110 Institute for Nuclear Research, Academy of Sciences, Moscow, Russia.
- 111 Physics Department, Panjab University, Chandigarh, India.
- 112 Comenius University Bratislava, Faculty of Mathematics, Physics and Informatics, Bratislava, Slovakia.
- 113 Physics department, Faculty of science, University of Zagreb, Zagreb, Croatia.
- 114 NRC Kurchatov Institute IHEP, Protvino, Russia.
- 115 INFN, Sezione di Trieste, Trieste, Italy.
- 116 Chicago State University, Chicago, Illinois, USA.
- 117 National Nuclear Research Center, Baku, Azerbaijan.
- 118 University of Kansas, Lawrence, Kansas, USA.
- 119 Instituto de Física, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil.
- 120 Nagasaki Institute of Applied Science, Nagasaki, Japan.
- 121 Wayne State University, Detroit, Michigan, USA.
- 122 Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, Split, Croatia.
- 123 Institute for Gravitational and Subatomic Physics (GRASP), Utrecht University/Nikhef, Utrecht, Netherlands.
- 124 A.I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation, Yerevan, Armenia.
- 125 University of Tokyo, Tokyo, Japan.
- 126 Faculty of Engineering and Science, Western Norway University of Applied Sciences, Bergen, Norway.
- 127 Centro de Investigación y de Estudios Avanzados (CINVESTAV), Mexico City and Mérida, Mexico.
- 128 Yonsei University, Seoul, Republic of Korea.
- 129 Creighton University, Nebraska, USA.
- 130 University of Tennessee, Knoxville, Tennessee, USA.
- 131 Ohio State University, Columbus, Ohio, USA.
- 132 Technical University of Košice, Košice, Slovakia.
- 133 Suranaree University of Technology, Nakhon Ratchasima, Thailand.
- 134 Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia.
- 135 KTO Karatay University, Konya, Turkey.
- 136 Hochschule Worms, Zentrum für Technologietransfer und Telekommunikation (ZTT), Worms, Germany.
- 137 Department of Physics, Pusan National University, Pusan, Republic of Korea.
- 138 University of Jyväskylä, Jyväskylä, Finland.
- 139 Jeonbuk National University, Jeonju, Republic of Korea.
- 140 Department of Physics, Sejong University, Seoul, Republic of Korea.
- 141 California Polytechnic State University, San Luis Obispo, California, USA.
- 142 National Centre for Nuclear Research, Warsaw, Poland.
- 143 University of South-Eastern Norway, Tonsberg, Norway.
- 144 China Institute of Atomic Energy, Beijing, China.
- 145 Dipartimento di Scienze MIFT, Università di Messina, Messina, Italy.
- 146 Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic.
- 147 Università degli Studi di Foggia, Foggia, Italy.
- 148 INFN, Sezione di Roma, Rome, Italy.
- 149 Dipartimento di Fisica dell'Università "La Sapienza", Rome, Italy.
- 150 Sezione INFN, Rome, Italy.
- 151 Helsinki Institute of Physics (HIP), Helsinki, Finland.
- 152 Chungbuk National University, Cheongju, Republic of Korea.
- 153 Hiroshima University, Hiroshima, Japan.
- 154 Budker Institute for Nuclear Physics, Novosibirsk, Russia.
- 155 Physics Department, University of Rajasthan, Jaipur, India.
- 156 Institute of Physics, Homi Bhabha National Institute, Bhubaneswar, India.
- 157 Physikalisches Institut, Eberhard-Karls-Universität Tübingen, Tübingen, Germany.
- 158 Nara Women's University (NWU), Nara, Japan.
- 159 Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, Kiev, Ukraine.
- PMID: 35570422
- DOI: 10.1103/PhysRevLett.128.172005
Polarization of Λ and Λ[over ¯] Hyperons along the Beam Direction in Pb-Pb Collisions at sqrt[s]_{NN}=5.02 TeV
Authors
Affiliations
- 1 Variable Energy Cyclotron Centre, Homi Bhabha National Institute, Kolkata, India.
- 2 Nuclear Physics Institute of the Czech Academy of Sciences, Řež u Prahy, Czech Republic.
- 3 Johann-Wolfgang-Goethe Universität Frankfurt Institut für Informatik, Fachbereich Informatik und Mathematik, Frankfurt, Germany.
- 4 European Organization for Nuclear Research (CERN), Geneva, Switzerland.
- 5 Dipartimento DISAT del Politecnico and Sezione INFN, Turin, Italy.
- 6 INFN, Sezione di Bologna, Bologna, Italy.
- 7 Department of Physics, Aligarh Muslim University, Aligarh, India.
- 8 Korea Institute of Science and Technology Information, Daejeon, Republic of Korea.
- 9 Faculty of Science, P.J. Šafárik University, Košice, Slovakia.
- 10 Indonesian Institute of Sciences, Jakarta, Indonesia.
- 11 NRC «Kurchatov» Institute - ITEP, Moscow, Russia.
- 12 Research Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany.
- 13 Fudan University, China.
- 14 National Research Centre Kurchatov Institute, Moscow, Russia.
- 15 INFN, Sezione di Torino, Turin, Italy.
- 16 Central China Normal University, Wuhan, China.
- 17 Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico.
- 18 COMSATS University Islamabad, Islamabad, Pakistan.
- 19 Dipartimento di Fisica e Astronomia dell'Università, Bologna, Italy.
- 20 Sezione INFN, Bologna, Italy.
- 21 University of Houston, Houston, Texas, USA.
- 22 Department of Physics and Technology, University of Bergen, Bergen, Norway.
- 23 Institut für Kernphysik, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, Germany.
- 24 St. Petersburg State University, St. Petersburg, Russia.
- 25 Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania.
- 26 Nikhef, National institute for subatomic physics, Amsterdam, Netherlands.
- 27 Westfälische Wilhelms-Universität Münster, Institut für Kernphysik, Münster, Germany.
- 28 Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.
- 29 INFN, Sezione di Padova, Padova, Italy.
- 30 Lawrence Berkeley National Laboratory, Berkeley, California, USA.
- 31 SUBATECH, IMT Atlantique, Université de Nantes, CNRS-IN2P3, Nantes, France.
- 32 Department of Physics, University of Oslo, Oslo, Norway.
- 33 Yale University, New Haven, Connecticut, USA.
- 34 Laboratoire de Physique des 2 Infinis, Irène Joliot-Curie, Orsay, France.
- 35 INFN, Sezione di Catania, Catania, Italy.
- 36 Gangneung-Wonju National University, Gangneung, Republic of Korea.
- 37 University of Science and Technology of China, Hefei, China.
- 38 Indian Institute of Technology Indore, Indore, India.
- 39 Physics Department, University of Jammu, Jammu, India.
- 40 Université Paris-Saclay Centre d'Etudes de Saclay (CEA), IRFU, Départment de Physique Nucléaire (DPhN), Saclay, France.
- 41 AGH University of Science and Technology, Cracow, Poland.
- 42 Helmholtz-Institut für Strahlen- und Kernphysik, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany.
- 43 Bose Institute, Department of Physics, Kolkata, India.
- 44 Centre for Astroparticle Physics and Space Science (CAPSS), Kolkata, India.
- 45 Dipartimento di Fisica e Astronomia dell'Università, Catania, Italy.
- 46 Sezione INFN, Catania, Italy.
- 47 Physik Department, Technische Universität München, Munich, Germany.
- 48 National and Kapodistrian University of Athens, School of Science, Department of Physics, Athens, Greece.
- 49 Wigner Research Centre for Physics, Budapest, Hungary.
- 50 Nuclear Physics Group, STFC Daresbury Laboratory, Daresbury, United Kingdom.
- 51 Université Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, France.
- 52 University of Liverpool, Liverpool, United Kingdom.
- 53 Dipartimento di Fisica e Astronomia dell'Università, Padova, Italy.
- 54 Sezione INFN, Padova, Italy.
- 55 Lund University Department of Physics, Division of Particle Physics, Division of Particle Physics, Lund, Sweden.
- 56 Joint Institute for Nuclear Research (JINR), Dubna, Russia.
- 57 Indian Institute of Technology Bombay (IIT), Mumbai, India.
- 58 Sección Física, Departamento de Ciencias, Pontificia Universidad Católica del Perú, Lima, Peru.
- 59 Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark.
- 60 Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France, Strasbourg, France.
- 61 NRNU Moscow Engineering Physics Institute, Moscow, Russia.
- 62 Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Mexico City, Mexico.
- 63 Dipartimento di Fisica dell'Università, Turin, Italy.
- 64 Sezione INFN, Turin, Italy.
- 65 Petersburg Nuclear Physics Institute, Gatchina, Russia.
- 66 Institute of Space Science (ISS), Bucharest, Romania.
- 67 Gauhati University, Department of Physics, Guwahati, India.
- 68 Dipartimento di Fisica dell'Università, Cagliari, Italy.
- 69 Sezione INFN, Cagliari, Italy.
- 70 INFN, Laboratori Nazionali di Frascati, Frascati, Italy.
- 71 Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czech Republic.
- 72 The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland.
- 73 The University of Texas at Austin, Austin, Texas, USA.
- 74 Moscow Institute for Physics and Technology, Moscow, Russia.
- 75 Dipartimento di Fisica e Nucleare e Teorica, Università di Pavia, Pavia, Italy.
- 76 INFN, Sezione di Pavia, Pavia, Italy.
- 77 Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA.
- 78 Inha University, Incheon, Republic of Korea.
- 79 Università di Brescia, Brescia, Italy.
- 80 Universidade de São Paulo (USP), São Paulo, Brazil.
- 81 Dipartimento Interateneo di Fisica "M. Merlin", Bari, Italy.
- 82 Sezione INFN, Bari, Italy.
- 83 Politecnico di Bariand Sezione INFN, Bari, Italy.
- 84 Russian Federal Nuclear Center (VNIIEF), Sarov, Russia.
- 85 Stefan Meyer Institut für Subatomare Physik (SMI), Vienna, Austria.
- 86 iThemba LABS, National Research Foundation, Somerset West, South Africa.
- 87 University of the Witwatersrand, Johannesburg, South Africa.
- 88 Universidad Autónoma de Sinaloa, Culiacán, Mexico.
- 89 High Energy Physics Group, Universidad Autónoma de Puebla, Puebla, Mexico.
- 90 Dipartimento di Fisica dell'Università, Trieste, Italy.
- 91 Sezione INFN, Trieste, Italy.
- 92 Saha Institute of Nuclear Physics, Homi Bhabha National Institute, Kolkata, India.
- 93 Université de Lyon, CNRS/IN2P3, Institut de Physique des 2 Infinis de Lyon, Lyon, France.
- 94 Universidade Estadual de Campinas (UNICAMP), Campinas, Brazil.
- 95 University of Tsukuba, Tsukuba, Japan.
- 96 INFN, Sezione di Cagliari, Cagliari, Italy.
- 97 University of Cape Town, Cape Town, South Africa.
- 98 INFN, Sezione di Bari, Bari, Italy.
- 99 School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom.
- 100 Laboratoire de Physique Subatomique et de Cosmologie, Université Grenoble-Alpes, CNRS-IN2P3, Grenoble, France.
- 101 Dipartimento di Scienze e Innovazione Tecnologica dell'Università del Piemonte Orientale and INFN Sezione di Torino, Alessandria, Italy.
- 102 Universidade Federal do ABC, Santo Andre, Brazil.
- 103 National Institute of Science Education and Research, Homi Bhabha National Institute, Jatni, India.
- 104 Dipartimento di Fisica "E.R. Caianiello" dell'Università, Salerno, Italy.
- 105 Gruppo Collegato INFN, Salerno, Italy.
- 106 Frankfurt Institute for Advanced Studies, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, Germany.
- 107 Warsaw University of Technology, Warsaw, Poland.
- 108 Department of Physics, University of California, Berkeley, California, USA.
- 109 Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Havana, Cuba.
- 110 Institute for Nuclear Research, Academy of Sciences, Moscow, Russia.
- 111 Physics Department, Panjab University, Chandigarh, India.
- 112 Comenius University Bratislava, Faculty of Mathematics, Physics and Informatics, Bratislava, Slovakia.
- 113 Physics department, Faculty of science, University of Zagreb, Zagreb, Croatia.
- 114 NRC Kurchatov Institute IHEP, Protvino, Russia.
- 115 INFN, Sezione di Trieste, Trieste, Italy.
- 116 Chicago State University, Chicago, Illinois, USA.
- 117 National Nuclear Research Center, Baku, Azerbaijan.
- 118 University of Kansas, Lawrence, Kansas, USA.
- 119 Instituto de Física, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil.
- 120 Nagasaki Institute of Applied Science, Nagasaki, Japan.
- 121 Wayne State University, Detroit, Michigan, USA.
- 122 Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, Split, Croatia.
- 123 Institute for Gravitational and Subatomic Physics (GRASP), Utrecht University/Nikhef, Utrecht, Netherlands.
- 124 A.I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation, Yerevan, Armenia.
- 125 University of Tokyo, Tokyo, Japan.
- 126 Faculty of Engineering and Science, Western Norway University of Applied Sciences, Bergen, Norway.
- 127 Centro de Investigación y de Estudios Avanzados (CINVESTAV), Mexico City and Mérida, Mexico.
- 128 Yonsei University, Seoul, Republic of Korea.
- 129 Creighton University, Nebraska, USA.
- 130 University of Tennessee, Knoxville, Tennessee, USA.
- 131 Ohio State University, Columbus, Ohio, USA.
- 132 Technical University of Košice, Košice, Slovakia.
- 133 Suranaree University of Technology, Nakhon Ratchasima, Thailand.
- 134 Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia.
- 135 KTO Karatay University, Konya, Turkey.
- 136 Hochschule Worms, Zentrum für Technologietransfer und Telekommunikation (ZTT), Worms, Germany.
- 137 Department of Physics, Pusan National University, Pusan, Republic of Korea.
- 138 University of Jyväskylä, Jyväskylä, Finland.
- 139 Jeonbuk National University, Jeonju, Republic of Korea.
- 140 Department of Physics, Sejong University, Seoul, Republic of Korea.
- 141 California Polytechnic State University, San Luis Obispo, California, USA.
- 142 National Centre for Nuclear Research, Warsaw, Poland.
- 143 University of South-Eastern Norway, Tonsberg, Norway.
- 144 China Institute of Atomic Energy, Beijing, China.
- 145 Dipartimento di Scienze MIFT, Università di Messina, Messina, Italy.
- 146 Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic.
- 147 Università degli Studi di Foggia, Foggia, Italy.
- 148 INFN, Sezione di Roma, Rome, Italy.
- 149 Dipartimento di Fisica dell'Università "La Sapienza", Rome, Italy.
- 150 Sezione INFN, Rome, Italy.
- 151 Helsinki Institute of Physics (HIP), Helsinki, Finland.
- 152 Chungbuk National University, Cheongju, Republic of Korea.
- 153 Hiroshima University, Hiroshima, Japan.
- 154 Budker Institute for Nuclear Physics, Novosibirsk, Russia.
- 155 Physics Department, University of Rajasthan, Jaipur, India.
- 156 Institute of Physics, Homi Bhabha National Institute, Bhubaneswar, India.
- 157 Physikalisches Institut, Eberhard-Karls-Universität Tübingen, Tübingen, Germany.
- 158 Nara Women's University (NWU), Nara, Japan.
- 159 Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, Kiev, Ukraine.
- PMID: 35570422
- DOI: 10.1103/PhysRevLett.128.172005
Abstract
The polarization of the Λ and Λ[over ¯] hyperons along the beam (z) direction, P_{z}, has been measured in Pb-Pb collisions at sqrt[s_{NN}]=5.02 TeV recorded with ALICE at the Large Hadron Collider (LHC). The main contribution to P_{z} comes from elliptic flow-induced vorticity and can be characterized by the second Fourier sine coefficient P_{z,s2}=⟨P_{z}sin(2φ-2Ψ_{2})⟩, where φ is the hyperon azimuthal emission angle and Ψ_{2} is the elliptic flow plane angle. We report the measurement of P_{z,s2} for different collision centralities and in the 30%-50% centrality interval as a function of the hyperon transverse momentum and rapidity. The P_{z,s2} is positive similarly as measured by the STAR Collaboration in Au-Au collisions at sqrt[s_{NN}]=200 GeV, with somewhat smaller amplitude in the semicentral collisions. This is the first experimental evidence of a nonzero hyperon P_{z} in Pb-Pb collisions at the LHC. The comparison of the measured P_{z,s2} with the hydrodynamic model calculations shows sensitivity to the competing contributions from thermal and the recently found shear-induced vorticity, as well as to whether the polarization is acquired at the quark-gluon plasma or the hadronic phase.